JP2013165022A - Vehicle lamp - Google Patents
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- JP2013165022A JP2013165022A JP2012028349A JP2012028349A JP2013165022A JP 2013165022 A JP2013165022 A JP 2013165022A JP 2012028349 A JP2012028349 A JP 2012028349A JP 2012028349 A JP2012028349 A JP 2012028349A JP 2013165022 A JP2013165022 A JP 2013165022A
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- lamp body
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Images
Classifications
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J175/00—Adhesives based on polyureas or polyurethanes; Adhesives based on derivatives of such polymers
- C09J175/04—Polyurethanes
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
- F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
- F21S41/20—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by refractors, transparent cover plates, light guides or filters
- F21S41/29—Attachment thereof
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
- F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
- F21S41/50—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by aesthetic components not otherwise provided for, e.g. decorative trim, partition walls or covers
- F21S41/55—Attachment thereof
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
- F21S45/00—Arrangements within vehicle lighting devices specially adapted for vehicle exteriors, for purposes other than emission or distribution of light
- F21S45/50—Waterproofing
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J2301/00—Additional features of adhesives in the form of films or foils
- C09J2301/30—Additional features of adhesives in the form of films or foils characterized by the chemical, physicochemical or physical properties of the adhesive or the carrier
- C09J2301/306—Additional features of adhesives in the form of films or foils characterized by the chemical, physicochemical or physical properties of the adhesive or the carrier the adhesive being water-activatable
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Non-Portable Lighting Devices Or Systems Thereof (AREA)
- Lighting Device Outwards From Vehicle And Optical Signal (AREA)
Abstract
【課題】ベース樹脂と植物繊維とを含有する樹脂組成物から形成されたランプボディを用いた車両用灯具において、ランプボディと前面カバーとの接着性が良好で、経時によりランプボディと前面カバーとの接合の剥離がないものを提供する。
【解決手段】前方が開口したランプボディ３と、その前方開口部を閉塞して取り付けられた前面カバー２とを有する車両用灯具１であって、ランプボディ３がベース樹脂と植物繊維とを含有する樹脂組成物から形成されたものであり、ランプボディ３と前面カバー２との接合部が湿気硬化型接着剤により接合されていることを特徴とする。
【選択図】図１In a vehicular lamp using a lamp body formed of a resin composition containing a base resin and a vegetable fiber, the adhesiveness between the lamp body and the front cover is good, and the lamp body and the front cover are gradually changed over time. Provide the one that does not peel off.
A lamp 1 for a vehicle having a lamp body 3 opened at the front and a front cover 2 attached by closing the front opening, the lamp body 3 containing a base resin and plant fibers. The joining part of the lamp body 3 and the front cover 2 is joined by a moisture curing type adhesive.
[Selection] Figure 1
Description
本発明は、車両用灯具に関し、軽量かつ高強度で、ランプボディと前面カバーとの接着性が良好で、経時によるランプボディと前面カバーとの接合部の剥離がない車両用灯具に関する。 The present invention relates to a vehicular lamp, and relates to a vehicular lamp that is light and strong, has good adhesion between a lamp body and a front cover, and does not peel off the joint between the lamp body and the front cover over time.
近年、車両の軽量化が望まれており、そのため車両を構成する各パーツの軽量化が進められている。軽量化が求められる車両パーツの１つに灯具（ランプ類）も含まれる。
車両用灯具は、一般的に、前方が開口したランプボディ、その前方開口部を閉塞して取り付けられた前面カバー、エクステンション、リフレクタ、光源、電装部品等を有するものである。このような車両用灯具の総重量を軽量化には、一般的に樹脂材料で形成されかつ車両用灯具の総重量に対して比較的高い比率を占めるランプボディの軽量化が有効であると考えられる。
In recent years, weight reduction of vehicles has been desired, and therefore, weight reduction of each part constituting the vehicle has been promoted. Lamps (lamps) are also included as one of the vehicle parts that are required to be lighter.
A vehicular lamp generally includes a lamp body that is open at the front, a front cover that is attached by closing the front opening, an extension, a reflector, a light source, an electrical component, and the like. In order to reduce the total weight of such a vehicular lamp, it is considered effective to reduce the weight of a lamp body that is generally formed of a resin material and occupies a relatively high ratio with respect to the total weight of the vehicular lamp. It is done.
一方、樹脂材料から形成される樹脂成形体は、樹脂のみから形成すると強度等が不十分であるため、充填剤（フィラー）をベース樹脂に添加するのが一般的である。そして機械的強度等を必要とする樹脂成形体に好適なフィラーとしては、一般的に、タルク等の比較的比重の高い鉱物性のものが用いられていた。
このことから、樹脂材料から形成される樹脂成形体において、その強度を保ちながら、軽量化を目指す場合には、フィラーとしては比重のより小さいものを使用することが有効と考えられる。
そして特許文献１には、ポリプロピレンと植物繊維を含む樹脂組成物で成型体を得る技術が開示されている。
On the other hand, since a resin molded body formed from a resin material has insufficient strength when formed only from a resin, a filler (filler) is generally added to the base resin. In general, mineral fillers having a relatively high specific gravity such as talc have been used as fillers suitable for resin moldings that require mechanical strength and the like.
From this, in the resin molded body formed from the resin material, it is considered effective to use a filler having a smaller specific gravity when aiming at weight reduction while maintaining its strength.
Patent Document 1 discloses a technique for obtaining a molded body from a resin composition containing polypropylene and plant fibers.
一方、前方が開口したランプボディとその前方開口部を閉塞して取り付けられた前面カバーを有する車両用灯具は、該ランプボディと該前面カバーの接合は、ホットメルト接着剤を使用することが一般的である。 On the other hand, in a vehicular lamp having a lamp body having a front opening and a front cover attached by closing the front opening, a hot melt adhesive is generally used for joining the lamp body and the front cover. Is.
しかしながら、ベース樹脂と植物繊維とを含有する樹脂組成物から形成されたランプボディと前面カバーとの接合に、ホットメルト接着剤を使用すると、ランプボディと前面カバーとの接着性が悪く、一旦接合ができたとしても、時間の経過により接合部が剥離するという問題があった。
これらの事情に鑑み、本発明は、ベース樹脂と植物繊維とを含有する樹脂組成物から形成されたランプボディを用いた車両用灯具において、ランプボディと前面カバーとの接着性が良好で、経時によりランプボディと前面カバーとの接合の剥離がない車両用灯具を提供しようとするものである。
However, if a hot melt adhesive is used to join the lamp body formed from a resin composition containing a base resin and a vegetable fiber and the front cover, the adhesiveness between the lamp body and the front cover is poor, and once joined. Even if it was possible, there existed a problem that a junction part peeled with progress of time.
In view of these circumstances, the present invention provides a vehicular lamp using a lamp body formed from a resin composition containing a base resin and a plant fiber, and the adhesiveness between the lamp body and the front cover is good. Accordingly, an object of the present invention is to provide a vehicular lamp that does not peel off the joint between the lamp body and the front cover.
本発明の発明者らは、鋭意検討の結果、下記構成を採ることにより上記課題を解決することができた。
即ち、本発明は以下の通りである。
As a result of intensive studies, the inventors of the present invention have been able to solve the above problems by adopting the following configuration.
That is, the present invention is as follows.
（１）前方が開口したランプボディと、その前方開口部を閉塞して取り付けられた前面カバーとを有する車両用灯具であって、
該ランプボディがベース樹脂と植物繊維とを含有する樹脂組成物から形成されたものであり、
該ランプボディと該前面カバーとの接合部が湿気硬化型接着剤により接合されていることを特徴とする車両用灯具。
（２）前記湿気硬化型接着剤が、シリコーン系、変性シリコーン系、ウレタン系、シアノ系及び反応性ホットメルト系のものから選ばれる少なくともいずれかであることを特徴とする前記（１）記載の車両用灯具。
(1) A vehicular lamp having a lamp body having a front opening, and a front cover attached by closing the front opening,
The lamp body is formed from a resin composition containing a base resin and a vegetable fiber,
A vehicular lamp characterized in that a joint between the lamp body and the front cover is joined with a moisture-curing adhesive.
(2) The moisture curable adhesive is at least one selected from silicone-based, modified silicone-based, urethane-based, cyano-based, and reactive hot-melt adhesives. Vehicle lamp.
（３）前記ベース樹脂が、ポリプロピレン、ポリエチレン、ポリ乳酸、ポリカーボネート、ポリエチレンテレフタレート、ポリブチレンテレフタレート、ポリスチレン、アクリロニトリル−ブタジエン−スチレン共重合体、アクリロニトリル−スチレン−アクリレート共重合体、アクリロニトリル−エチレン−スチレン共重合体、塩素化ポリエチレン−アクリロニトリル−スチレン共重合体、ポリアミド、ポリフェニレンサルファイド、液晶ポリマー、ポリサルフォン、エポキシ樹脂、ウレタン樹脂及びシリコーン樹脂から選ばれる少なくともいずれかであることを特徴とする前記（１）又は（２）記載の車両用灯具。
（４）前記植物繊維が、パルプ、ジュート麻、マニラ麻、サイザル麻、ガンピ、ミツマタ、コウゾ、スギ、タケ、カカオ、ケナフ、バナナ、パイナップル、サトウキビ、ココヤシ、トウモロコシ、バガス、ヤシ、ヨシ、エスパルト、サバイグラス、シュロ、バショウ、マツ、クワ、リュウゼツラン、ムギ、イネ及びヒノキから選ばれる少なくともいずれかであることを特徴とする前記（１）〜（３）のいずれか記載の車両用灯具。
(3) The base resin is polypropylene, polyethylene, polylactic acid, polycarbonate, polyethylene terephthalate, polybutylene terephthalate, polystyrene, acrylonitrile-butadiene-styrene copolymer, acrylonitrile-styrene-acrylate copolymer, acrylonitrile-ethylene-styrene copolymer. The above (1) or at least one selected from a polymer, a chlorinated polyethylene-acrylonitrile-styrene copolymer, polyamide, polyphenylene sulfide, liquid crystal polymer, polysulfone, epoxy resin, urethane resin, and silicone resin (2) The vehicular lamp according to (2).
(4) The plant fiber is pulp, jute hemp, manila hemp, sisal hemp, ganpi, mitsumata, kouzo, cedar, bamboo, cacao, kenaf, banana, pineapple, sugar cane, coconut, corn, bagasse, palm, reed, esparto, The vehicular lamp according to any one of (1) to (3) above, wherein the vehicular lamp is at least one selected from saby grass, palm, bamboo shoots, pine, mulberry, agave, wheat, rice and cypress.
植物繊維を含有する樹脂組成物から形成されたランプボディと前面カバーとの接合にホットメルト接着剤を使用した場合に、一旦接合ができたとしても時間の経過により接合部が剥離する原因としては、明確ではないが、以下の理由が考えられる。
植物繊維は水分を含み易い。水分を含んだ植物繊維を含むランプボディと前面カバーとをホットメルト接着剤を使用して接合したものを、車両用灯具としての通常の使用条件下（１００℃付近、長時間）で使用した場合、ランプボディの接着面付近に含まれる植物繊維から水分が放湿され、接着界面に水分が入り込み、剥離が促進されると考えられる。この剥離の促進は、接着界面に入り込んだ水分が、接着剤の硬化面に押し込まれて、該接着剤硬化面に接着性が劣化するような空孔が発生するためと推測され、該空孔は前面カバー（ＰＣ）越しに確認できる。
When a hot melt adhesive is used for joining the lamp body formed from a resin composition containing a plant fiber and the front cover, even if it can be joined once, the cause of the joint peeling off over time is as follows. Although not clear, the following reasons can be considered.
Plant fibers are easy to contain moisture. When a lamp body containing moisture-containing plant fibers and a front cover are joined using a hot-melt adhesive under normal use conditions (around 100 ° C for a long time) as a vehicular lamp It is considered that moisture is released from the plant fibers contained in the vicinity of the bonding surface of the lamp body, moisture enters the bonding interface, and peeling is promoted. This acceleration of peeling is presumed to be because moisture that has entered the adhesive interface is pushed into the cured surface of the adhesive, and voids are generated on the cured adhesive surface, which deteriorates the adhesiveness. Can be confirmed through the front cover (PC).
しかしながら、本発明では、ランプボディと前面カバーとの接合に湿気硬化型接着剤を使用することにより、ランプボディの接着面付近に含まれる植物繊維から水分が放湿され接着界面に水分が入り込んだとしても、その水分は湿気硬化型接着剤により吸収され、接着剤の硬化面に接着性が劣化するような空孔が発生しないものと推測される。
また、ランプボディと前面カバーとの接合作業時に、ランプボディに含まれる植物繊維から放湿される水分が、却って、接着剤の効果を促進し、ランプボディと前面カバーとの接合作業性を向上させるものと推測される。また、該接着剤が、灯室内の湿気を吸収することにより、完成した灯具の水曇りの問題も低減できるものと推測される。
However, in the present invention, by using a moisture-curing adhesive for joining the lamp body and the front cover, moisture is released from the plant fibers contained in the vicinity of the bonding surface of the lamp body, and moisture enters the bonding interface. Even so, it is presumed that the moisture is absorbed by the moisture-curing adhesive, and no voids are generated on the cured surface of the adhesive that deteriorates the adhesiveness.
In addition, the moisture released from the plant fibers contained in the lamp body during the joining work between the lamp body and the front cover, on the contrary, promotes the effect of the adhesive and improves the joining workability between the lamp body and the front cover. It is estimated that Further, it is presumed that the adhesive can absorb the moisture in the lamp chamber, thereby reducing the problem of water fogging of the completed lamp.
本発明によれば、植物繊維を含むランプボディと前面カバーとの接合に湿気硬化型接着剤を使用することにより、ランプボディと前面カバーとの接着性が良好になり、経時によるランプボディと前面カバーとの接合部の剥離を無くすことができる。 According to the present invention, the moisture-curing adhesive is used for joining the lamp body containing the plant fiber and the front cover, thereby improving the adhesion between the lamp body and the front cover, and the lamp body and the front cover over time. Peeling of the joint portion with the cover can be eliminated.
以下、本発明の車両用灯具についての好ましい実施形態を詳細に説明する。
本発明の車両用灯具の一例を図１の模式断面図にて説明する。
本発明の車両用灯具１は、素通し状の透明な前面カバー２とランプボディ３とを有し、前面カバー２とランプボディ３とで区画形成された灯室４内に、灯具ユニット５がランプボディ３にエイミング機構６を介して支持されている。図１に示す灯具ユニット５は、投影レンズ８と、光源１０と、リフレクタ１３とを備えている。また、前面カバー２の後方に投影レンズ８を露出させるようにランプボディ３の内面を覆うエクステンション５０が配置される。
Hereinafter, preferred embodiments of the vehicle lamp of the present invention will be described in detail.
An example of the vehicular lamp of the present invention will be described with reference to the schematic cross-sectional view of FIG.
A vehicular lamp 1 according to the present invention has a transparent
本発明の車両用灯具に使用するランプボディ（以下「本発明のランプボディ」とも称する）３について説明する。
本発明のランプボディ３は、上述したように、前方が開口した形状を有し、その前方開口部には、前面カバー２が取り付けられる。
また、本発明のランプボディ３は、ベース樹脂と植物繊維とを含有する樹脂組成物から成形されたものである。
本発明のランプボディ３を成形するために用いる樹脂組成物に使用される植物繊維としては、特に限定されないが、パルプ、ジュート麻、マニラ麻、サイザル麻、ガンピ、ミツマタ、コウゾ、スギ、タケ、カカオ、ケナフ、バナナ、パイナップル、サトウキビ、ココヤシ、トウモロコシ、バガス、ヤシ、ヨシ、エスパルト、サバイグラス、シュロ、バショウ、マツ、クワ、リュウゼツラン、ムギ、イネ及びヒノキ等が挙げれら、中でも、パルプ、ジュート麻が好ましい。
上記の植物繊維の含有量は、特に限定されず、使用する植物繊維の種類、共に使用する後述のベース樹脂の種類等によって、適宜選択されることが好ましいが、本発明のランプボディ３中に５〜８０質量％含むことが好ましく、１５〜６０質量％含むことがより好ましい。
A lamp body 3 (hereinafter also referred to as “the lamp body of the present invention”) 3 used in the vehicular lamp of the present invention will be described.
As described above, the lamp body 3 of the present invention has a shape with the front opening, and the
The lamp body 3 of the present invention is formed from a resin composition containing a base resin and plant fibers.
The plant fiber used in the resin composition used for molding the lamp body 3 of the present invention is not particularly limited, but is pulp, jute hemp, manila hemp, sisal hemp, ganpi, mitsumata, kouzo, cedar, bamboo, cacao. , Kenaf, banana, pineapple, sugar cane, coconut palm, corn, bagasse, palm, reed, esparto, sabaigrass, palm, basho, pine, mulberry, agave, wheat, rice and cypress, among others, pulp, jute hemp preferable.
The content of the plant fiber is not particularly limited, and is preferably selected as appropriate depending on the type of plant fiber to be used, the type of a base resin to be used later, and the like, but in the lamp body 3 of the present invention. It is preferable to contain 5-80 mass%, and it is more preferable to contain 15-60 mass%.
本発明のランプボディ３を成形するために用いる樹脂組成物に使用されるベース樹脂としては、特に限定されないが、ポリプロピレン（ＰＰ）、ポリエチレン（ＰＥ）、ポリ乳酸（ＰＬＡ）、ポリカーボネート（ＰＣ）、ポリエチレンテレフタレート（ＰＥＴ）、ポリブチレンテレフタレート（ＰＢＴ）、ポリスチレン（ＰＳ）、アクリロニトリル−ブタジエン−スチレン共重合体（ＡＢＳ）、アクリロニトリル−スチレン−アクリレート共重合体（ＡＡＳ）、アクリロニトリル−エチレン−スチレン共重合体（ＡＥＳ）、塩素化ポリエチレン−アクリロニトリル−スチレン共重合体（ＡＣＳ）、ポリアミド（ＰＡ）、ポリフェニレンサルファイド（ＰＰＳ）、液晶ポリマー（ＬＣＰ）、ポリサルフォン（ＰＳＵ）、エポキシ樹脂、ウレタン樹脂及びシリコーン樹脂等が挙げれら、中でも、ＰＰが好ましい。 Although it does not specifically limit as base resin used for the resin composition used in order to shape | mold the lamp body 3 of this invention, Polypropylene (PP), polyethylene (PE), polylactic acid (PLA), polycarbonate (PC), Polyethylene terephthalate (PET), polybutylene terephthalate (PBT), polystyrene (PS), acrylonitrile-butadiene-styrene copolymer (ABS), acrylonitrile-styrene-acrylate copolymer (AAS), acrylonitrile-ethylene-styrene copolymer (AES), chlorinated polyethylene-acrylonitrile-styrene copolymer (ACS), polyamide (PA), polyphenylene sulfide (PPS), liquid crystal polymer (LCP), polysulfone (PSU), epoxy resin, urethane These include fats and silicone resin or the like, among them, PP is preferable.
本発明のランプボディ３を成形するために用いる樹脂組成物を調製する際には、少なくとも前記ベース樹脂と植物繊維が均一になるように混錬する。
この際の混錬方法としては、特に限定されず、公周知のスクリュー混錬等各種の混錬方法を採ることができる。
When preparing the resin composition used for molding the lamp body 3 of the present invention, at least the base resin and the plant fiber are kneaded so as to be uniform.
The kneading method in this case is not particularly limited, and various kneading methods such as publicly known screw kneading can be employed.
前記樹脂組成物から形成された本発明のランプボディ３と前面カバー２は、湿気硬化型接着剤よって接合される。なお、この場合、必要に応じて接着部に事前にプラズマ処理やＵＶ処理等の活性処理を施してもよい。
本発明に使用する湿気硬化型接着剤としては、大気中の水分により硬化が促進されるものであり、このようなものであれば特に限定されないが、例えば、シリコーン系、変性シリコーン系、ウレタン系、シアノ系及び反応性ホットメルト系のものが挙げられる。
The lamp body 3 and the
The moisture curable adhesive used in the present invention is one that is cured by moisture in the atmosphere, and is not particularly limited as long as it is such as, for example, silicone-based, modified silicone-based, urethane-based , Cyano type and reactive hot melt type.
本発明に使用する前面カバー２は、素通し状の透明なもので、ランプボディ３の前方開口部を閉塞し灯室を形成し得るものであれば、材質は特に限定されず、公周知のもの等を用いることができるが、具体的なものとしては、ポリカーボネート、アクリル樹脂及びポリスチレン等の透明な熱可塑性樹脂や、ガラス等の無機透明材料等が挙げられる。
The
以下、本発明に係る実施例、比較例及び参考例（従来例）を用いた評価試験の結果を示し、本発明を更に詳細に説明する。なお、本発明はこれら実施例に限定されるものではない。 Hereinafter, the results of evaluation tests using Examples, Comparative Examples, and Reference Examples (Conventional Examples) according to the present invention will be shown, and the present invention will be described in more detail. The present invention is not limited to these examples.
〔実施例１〜３、比較例１〜３及び従来例〕
（ベース樹脂と植物繊維の混合・ペレット化）
ポリプロピレン（ＰＰ）をベース樹脂とし、下記表１に記載の植物繊維を、ベース樹脂と植物繊維の総量に対して下記表１に記載の含有量になるように添加し混錬を行った。
混錬後、押出し混錬機を用いて平均直径３ｍｍ、平均長８ｍｍのペレットを作製した。
[Examples 1 to 3, Comparative Examples 1 to 3 and Conventional Example]
(Mixing and pelletizing of base resin and plant fiber)
Polypropylene (PP) was used as a base resin, and plant fibers described in Table 1 below were added and kneaded so as to have a content described in Table 1 below with respect to the total amount of the base resin and plant fibers.
After kneading, pellets having an average diameter of 3 mm and an average length of 8 mm were produced using an extrusion kneader.
（成型体の作製）
各ペレットを９０℃、４時間の事前乾燥を行った後、射出成形機（東芝機械（株）製、ＥＣ４０Ｎ）に各々投入し、シリンダ温度１９０℃、金型温度４０℃で射出成形して、１１０ｍｍ×６０ｍｍ×３ｍｍの長方形の板状試験片を成形した。
(Production of molded body)
After pre-drying each pellet at 90 ° C. for 4 hours, each pellet is put into an injection molding machine (Toshiba Machine Co., Ltd., EC40N), and injection molded at a cylinder temperature of 190 ° C. and a mold temperature of 40 ° C. A rectangular plate-shaped test piece of 110 mm × 60 mm × 3 mm was molded.
（接着性評価）
成形した板状試験片を接着部に予め活性化処理した後、下記表１に示す接着剤を用いて、同サイズのポリカーボネート（ＰＣ）板と貼り合わせた。但し、接着剤の塗布は、貼り合わせ面の全面ではなく１部分のみとした。ウレタン系湿気硬化型接着剤で張り合わせたものは、室温で１週間静置し、硬化を終了させた。
各張り合わせサンプルについて、接着剤塗布部から一定距離離れた隙間（試験片とＰＣ板の間）に楔を打ち、下記表１に示す各環境条件下に晒し、試験片とＰＣ板との接着性が維持できるかを評価した。結果を下記表１に示す。
(Adhesion evaluation)
The molded plate-shaped test piece was previously activated on the bonded portion, and then bonded to a polycarbonate (PC) plate of the same size using the adhesive shown in Table 1 below. However, the adhesive was applied only to one part instead of the entire bonding surface. Those bonded with a urethane-based moisture curable adhesive were allowed to stand at room temperature for 1 week to complete the curing.
For each bonded sample, a wedge is struck in a gap (between the test piece and the PC board) that is a certain distance from the adhesive application part, and exposed to the environmental conditions shown in Table 1 below to maintain the adhesion between the test piece and the PC board. We evaluated whether it was possible. The results are shown in Table 1 below.
ホットメルト型接着剤を用いた場合、従来例では、ＰＣ板と植物繊維非含有ＰＰ板とを接着することができたが、比較例では、植物繊維含有ＰＰ板との接着では１００℃の環境下ですべて剥離した。これは、高温で植物繊維から放湿された水分が接着剤との界面に入り込み、この水分が接着剤硬化面に押し込まれて、該接着剤硬化面に空孔が発生したためと推測される。
一方、湿気硬化型接着剤を用いた実施例では、植物繊維から放湿された水分が該接着剤に吸収されるため、高温環境下でも剥離が生じない。また、植物繊維から水分が供給されることにより、植物繊維非含有ＰＰを用いた場合よりも接着剤の硬化が進みやすくなる。
In the case of using a hot-melt adhesive, in the conventional example, the PC board and the plant fiber-free PP board could be bonded, but in the comparative example, the environment of 100 ° C. was used for bonding with the plant fiber-containing PP board. All peeled off below. This is presumably because the moisture released from the plant fibers at a high temperature entered the interface with the adhesive, and this moisture was pushed into the adhesive-cured surface, resulting in holes in the adhesive-cured surface.
On the other hand, in the example using the moisture curable adhesive, moisture released from the plant fiber is absorbed by the adhesive, and therefore, no peeling occurs even in a high temperature environment. Further, by supplying moisture from the plant fiber, the adhesive is more easily cured than when the plant fiber-free PP is used.
１ 車両用灯具
２ 前面カバー
３ ランプボディ
４ 灯室
５ 灯具ユニット
６ エイミング機構
８ 投影レンズ
１０ 光源
１３ リフレクタ
５０ エクステンション
DESCRIPTION OF SYMBOLS 1
Claims (4)
該ランプボディがベース樹脂と植物繊維とを含有する樹脂組成物から形成されたものであり、
該ランプボディと該前面カバーとの接合部が湿気硬化型接着剤により接合されていることを特徴とする車両用灯具。 A vehicular lamp having a lamp body whose front is open, and a front cover attached by closing the front opening,
The lamp body is formed from a resin composition containing a base resin and a vegetable fiber,
A vehicular lamp characterized in that a joint between the lamp body and the front cover is joined with a moisture-curing adhesive.
The plant fiber is pulp, jute hemp, manila hemp, sisal hemp, Gamppi, mitsumata, kouzo, cedar, bamboo, cacao, kenaf, banana, pineapple, sugar cane, coconut, corn, bagasse, palm, reed, esparto, survivgrass, palm The vehicular lamp according to any one of claims 1 to 3, wherein the vehicular lamp is at least any one selected from the group consisting of corn, pine, pine, mulberry, agave, wheat, rice and cypress.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2012028349A JP2013165022A (en) | 2012-02-13 | 2012-02-13 | Vehicle lamp |
| PCT/JP2013/052499 WO2013121915A1 (en) | 2012-02-13 | 2013-02-04 | Vehicle light |
| CN201380009313.7A CN104114937A (en) | 2012-02-13 | 2013-02-04 | Vehicle light |
| US14/378,242 US9359539B2 (en) | 2012-02-13 | 2013-02-04 | Vehicle lamp |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2012028349A JP2013165022A (en) | 2012-02-13 | 2012-02-13 | Vehicle lamp |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2013165022A true JP2013165022A (en) | 2013-08-22 |
Family
ID=48984029
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2012028349A Pending JP2013165022A (en) | 2012-02-13 | 2012-02-13 | Vehicle lamp |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US9359539B2 (en) |
| JP (1) | JP2013165022A (en) |
| CN (1) | CN104114937A (en) |
| WO (1) | WO2013121915A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103788617A (en) * | 2014-01-28 | 2014-05-14 | 自贡川宇机械有限公司 | Polycarbonate/natural fiber composite material and preparation method thereof |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104487765A (en) * | 2012-07-24 | 2015-04-01 | 出光狮王塑料株式会社 | Vehicle Lamps |
| TWI572811B (en) | 2016-08-15 | 2017-03-01 | Chun-Hsien Kuo | To light bulb type light bulb headlights |
| JP7627134B2 (en) * | 2021-03-05 | 2025-02-05 | 株式会社小糸製作所 | Housing member for vehicle lamp |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN104114937A (en) | 2014-10-22 |
| US9359539B2 (en) | 2016-06-07 |
| WO2013121915A1 (en) | 2013-08-22 |
| US20150036376A1 (en) | 2015-02-05 |
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